Brake device



April 17, 1928. 1,666,144

- 0. PETERSQN BRAKE DEVICE Filed March 24. 1926 2 Sheets-Sheet. l

fiver! 07" April 17, 1928. Q

o. PETERSON BRAKE DEVICE Filed March 24. 1926 /l/l/A 2 Sheets-Sheet 2Oac 7" Patented Apr. 17, 1928.

UNITED STATES PATENT OFFICE.

OSCAR PETERSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO MILLS NOVELTY COMPANY,OF

I CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS,

BRAKE DEVICE.

Application filed March 24, 1926.

This invention relates particularly to a brake-device applied to musicsheet-feeding mechanism. v

The primary object is to provide an automatically actuated brake forsheet-feeding mechanism, such assheet-feeding mechanism employed forfeeding a music sheet in electrically operated musical instruments..More

. especially, it is the object of the present invention to providemechanism of the character indicated with a brake which is automaticallyapplied. to the take-up roll after the playing operation has beenconcluded and previous to the rewinding operation and which isautomatically withdrawn from the braking position, or relieved frombraking action, previous to or at about the time the playing operationbegins. I

By means of the 1m roved device, a desirable tension can be placed uponthe music sheet during the rewinding operation, that is, while itisbeing rewound from the takeup roll onto the music roll, and, on theother hand, the brake is inactive during the playing operation, so thatthe motor does not need to overcome the retarding effect of the brakeduring the playing operation.

The sheet-feeding and rewinding mechanism may be of any suitableconstruction. It is preferred to employ sheet-feeding and rewindingmechanism of the type described and claimed in Sandell Patent 1,302,439,granted April 29,1919. In this type. of

mechanism, a shaft driven from an electric motor and disposed in axialalignment with the take-up roll carries What is termed a compound dog,which, in the direct rotation of the motor drives the take-up rollthrough the medium of a crank with which its shaft is equipped, and, inthe reverse rotation of the, motor, engages a lu on a gear of agear-train which drives t e music roll and thus effects rewinding of themusic: from the take-up roll onto the music roll. Such mechanism is alsoequipped with a tracker,

bar, or, contact-roll, over which the music sheet passes and with whichcoacts a series of electric contacts which control the circuits whichoperate various elements employed in the playing of the musicalinstrument. r

'As isv well known in the art, a music sheet may be employed to controlthe playing of a piano, an organ, a stringed instrument of the violclass, or a combination of such musi- Serial No. 97,004.

eration, will then automatically rewind the music sheet on the musicroll, then repeat the playing operation, etc. v

The invention is illustrated in its preferred embodiment in theaccompanying drawings as applied to sheet-feeding and rewindingmechanism of the kind disclosed in Sandell Patent 1,302,439, only somuch of said mechanism being illustrated as is necessary for anunderstanding of the present invention. In the drawings- Fig. 1represents a broken front elevational view of sheet-feeding and rewindinmechanism equipped with the improve automatic brake;.and Fig. 2represents an end elevational view, partly in section, of saidmechanism. I

In the illustration given, A designates the frame of the sheet-feedingand .rewinding mechanism; B, a music roll suitably jour naled in theframe; C, a take-up roll; D, a

metallic contact-roll, or tracker-bar; E, :a

music sheet which passes from the music roll in front of thecontact-roll and thence to the take-up roll; F, a motor whichoperatesthrough a worm-shaft F and a wormwheel F to actuate'a shaft Fineither direction, depending upon the direction of rotation of themotor; F a compound dog of reversible character, which is fixedlysecured on the shaft F being interposed between a crank G with which theshaft of the takeup roll is equipped and the lower gear of a gear-trainH which serves to actuate the music roll B during the rewind operation,the compound dog F being thus'in position to actuate the take-up roll Cthrough the medium of the crank G during the play-in operation and toactuate the music ,ro l B through the medium of the gear-train H duringthe rewind operation; I, a contactcarrying insulation-bar mounted on arockframe I which is supported on pivots I (one shown), the rock-frame Ibeing equipped with an actuating arm I through the medium of which therock-frame may be turned on its pivots to bring the electric contactswhich co-act with the contact-roll D and music sheet E to the operativeposition; J, a pivotally suspended foot, or link, which connected bymeans of a pivot 1 with an arm 2 depending from the arm 1 the link Jservlng 1n the operation of lifting.

spring-held trip-lever which is journalled on the stud 5 and which isequipped with a lug 6 adapted to engage the link K and release it fromengagement with the stud 5 whenthe rotation of the motor is reversed, sothat the arm I will be permitted to drop and the contact-carrying bar Iwill be thrown to the inoperative position before the rewindingoperation begins; M, a spring which tends to throw the arm I downwardlyand thus rock the frame I about the pivots 1 said spring being operativeto perform this function in retracting the contactcarrying bar I; N, acontact carried by the bar I and co-acting with the contact-roll D andthus serving to establish a circuit and effect reversal of the motor atthe end of the playing operation, this action being accomplished by aslot (not shown) in the-music sheet which is beyond the slots of thesheet which serve in the playing operation; and P, a switch-leverequipped with a roller P which bears against the music sheet on thetake-up roll C, the switch-lever P serving to effect reversal of themotor at the end of the operation of rewinding the music sheet from thetake-up roll onto the music roll, so that the motor will resume itsdirect rotation for the purpose of feeding the sheet in the playingoperation.

The mechanism thus far described is constructed and operates insubstantial accordance with Sandell Patent 1,302,439, to which referenceis made.

The compound dog F which is'secured on the shaft F and which serves inthe direct rotation of the shaft in the direction indicated by the arrowin Fig. 2 to operate the take-up roll through the medium of the crank G,and in the reverse direction of rotation to actuate the gear-train Hand.

through the medium thereof, the music roll to effect rewinding of themusic sheet, corresponds with the compound dog 87 referred to in saidpatent. This compound dog is provided with a reversible member 7 whichis equipped with an arm 7 which, when the shaft F rotates clockwise, asshown in Fig. 2, serves to engage and elevate the link J and thus liftthe arm I. This result is accomplished preparatory to the playingoperation, the contact-carrying bar I being thus brought to theoperativeposition. The reversibledog-member 7 corresponds with themember 92 of the patent mentioned. After the playing operation has beencompleted, the'position of the dog member 7 is reversed immediatelyafter the motor starts to turn in the reverse direction,this reversal ofthe dog-member being effected by the trip-member L, whose movement isresisted by the spring 8 acting upon a suitable arm with which thetrip-member is provided. WVhen this action occurs, the arm 7 finallymoves the trip-member L far enough to cause the lug 6 to engage thelower end portion of the latch link K, thereby releasing said link fromengagement with the stud 5 and permitting the arm I to drop, thuscarrying the contactbar I to the inoperative position. The dogmember 7is provided with an arm 7 which is equipped on one side with a lug 7adapted to engage a lug, or wristpin, 9, which forms a part of the crankG, and which is equipped 011 the other side with a lug 7 adapted toengage a lug 7 with which the lower gear of the gear-train H isequipped. The operation in this respect isfully disclosed and describedin the above-mentioned patent.

The improved automatically applied and automatically releasedbrake-device is designated R. "It comprises a brake-shoe 10 which isadapted to bear against the adjacent flange 'of'tlie lower spool, ortake-up roll, C; a bell-crank lever 11 suspended from a pivot 12 andhaving its lower extremity connected with the brake-shoe; a push-rod 13having its lower'endpivotally connected at 14 with the short arm of thelever 11; a lug 15 projecting laterally inwardly from the arm '1 andprovided with a vertical per- 7 foration serving as a guide throughwhich the upper end of the push-rod 13 may work;

and a coil-spring 16 interposed between a collar 13 on the rod 13 andthe lug 15. The spring 16 is adapted to be placed under compression whenthe lever 1 drops from the position shown in Fig. 1, which action occursafter the playing operation has been completed and upon reversal of themotor to begin the rewindingoperation. hen the lever I drops itcompresses the spring 16 and causes the brake-shoe 10 to be heldforcibly against the flange 17 of the take-up roll. Thus, a brakingpressure will be applied to the take-up roll during theperiod lat whilethe music sheet is being rewound upon the music roll. On the other hand,when the arm I is lifted by the link J, the pressure on the spring 16 isrelieved so that the brakeshoe will rest only lightly against the flange17 of the take-up roll. This corresponds with the condition of themachine when the contact-bar I is in the' operative position, that is,in the music-playing position, and thus no substantial braking pressureis applied to the take-up roll during the period of playing.

The lower end portion of the lever 11 is provided with an inturned arm11 which extends through a slot 18 with which the end frame of themachine is provided. The extremity of the arm 11 is connected by atransverse pivot 11 with the brake-shoe 10. The lower end portion of thelever 11 also carries the short outwardly extending arm 11 which isprovided with a perforation to which the lower end of the rod 13 enipped with the coil spring 16 is attached. y reason of the pivotalconnection at 11, the

-. brake-shoe is free to adjust itself so as to make full contact withthe adjacent surface of the flange of the take-up roll.

For the purpose of the invention, it isunnecessary to illustrate anddescribe the electric circuits and devices for effecting the reversal ofthe motor and the driving of the motor in either direction. Theseelectric circuits may be the same as those shown and described in theabove-mentioned patent, or may be of any desired kind and arrangement.

It may be noted that the arm I which actuates the rock-member I has acurved portion 19 extending through a perforation 20 in the adjacentframe-member. The manner of monntin the rock-member and of actuating itis su hstantially as shown in the patent mentioned.

From the description given, the operation will be readily understood.Assuming the mechanism to be in the position shown in Fig. 2, the deviceis ready for the playing operation. member 7 of the compound dog F isabout to pass from beneath the link J, which has,

been elevated during the initial portion of the rotation of the shaft Fin a clockwise direction. As the direct rotation of the motor continues,the music sheet E is drawn fromthe music roll B and wound upon thetake-up roll C. It is to be observed that when the arm I was lifted bytheilink J, the pressure on the spring 16 was relieved, thus releasingthe braking pressure on the take-up roll, leaving it free to be operatedby the motor without retarding action by the brake. After substantiallyall of the music sheet has been transferred to the takeup roll, thecontact N operates in a well known manner to close the circuit and ef-In Fig. 2, the arm 7 of the feet reversal of the-motor. This causes theshaft F to rotate in a counter-clockwise direction. When this occurs,the trip L reverses the dog-member 7, and the dog-member then operatesthrough the trip to eifect release of the lower end of the latch link Kfrom the stud 5, thus permitting the arm I to drop under the action ofthe spring M. lVhen this occurs, the contact-carrying bar I is thrown tothe non-playing position. Also, when the arm I drops, the lug 15compresses the spring 16 and applies the braking action to the take-uproll. In the continued reverse rotation of the motor, the dog-member 7of the compound dog F, secured on the shaft F serves to rotate thegear-train H in a well known manner and thus cause the music roll B torotate in the proper direction to rewind the music sheet upon'the musicroll. At the end of the re Wind operation, the lever P operates toeffect reversal of the motor and cause it to rotate in its originaldirection of rotation, that is, in the music-playing direction.

It may be noted that the free end of the lever P is equipped with aspring held contact-member 21 which co-acts with a contact-plate 22 in asuitable circuit; also the lever P, which is pivotally supported at 23is equipped with a contact-stud 2a which engages a contact-pawl 25 whoseouter end is supported on a stationary pivot 26. The

contact N is connected by a conductor 27 with the contact-plate Thelever P is further connected by a conductor 28 with a swing-projectedcontact-member 29 which co-acts with a contact-member 30 carried by therock-frame I. The rock-frame I is in electrical contact with the mainframe, on which one side of the main circuit is ground ed. lVhen thecontact N makes contact with the contact-roll D at the end of theplaying operation, and while the contact-carrying bar I is in theplaying position, reversal of the motor occurs. However, this interruptsthe circuit at the point of contact between the member N and .the rollD. The circuit immediately reestablished, however, by the contact-member30, carried by the rockframe I engaging the contact-member 29. It shouldbe borne in mind that this action occurs when substantially all of themusic sheet is on the take-up roll C, at which time the right handportion of the lever P, as shown in Fig. 2,,occupies an elevatedposition, the pawl 25 being also lifted by the stud 21 and serving at a.portion of the circuit as a conductor. The pawl 25 and the contactplateare connected by suitable conductors 31 and 32 withthe same binding postof the motor (the connection not being shown, however); Thus, at the endof the playing operation, current may pass from the brush N through theconductor 27 to the contact-plate 22 and thence to H tt the motor in adirection to reversethe motor; and after the brush N has been with drawnfrom the contact-roll D, current may pass from the frame of the machinethrough the contact-member 30 to the contact-member 29, thence to thelever P, contact-stud 24:, pivoted contact-member 25, and conductor 31to the same binding-post of the motor. Eventually, the contact-member 21is brought into fully established contact with the plate 22, and thepawl 25, supported by a stud 33, ceases to contact with the contact-stud2 L of the lever P. The circuit is now carried wholly through thecontactmember 21 to the contact-plate 22 and thence to the motor.Finally, the contact-member 21 will spring past the contact-plate 22,and the circuit will be broken. This type of circuit-controlling devicemay be employed in connection with a motor having a weak field fordirect operation of the motor and having a stronger field whichwill-dominate and overcome the weak held in the reverse operation of themotor, that is, when the rewinding is being effected. On the other hand,if desired, the electric circuits and controlling devices may be thesame as those shown in the above-mentioned Sandell patent. V Theforegoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitations should be understoodtherefrom, but the appended claims should be construed as broadly aspermissible, in view of the prior art.

What I regard as new, and desire to secure by Letters Patent, is:

1. In means of the character set forth, the combination withsheet-feeding and rewind ing mechanism comprising a music roll, a'take-up roll, and a reversible electric motor for driving the rolls, ofa brake for the take-up roll, and means actuated by said motorcontrolling the application of said brake, said means maintaining thebrake in braking position during rewinding and in released conditionduring the music-playing operation, 7

2. Means of the character set forth in claim 1 characterized by acompression spring adapted to apply the brake, a member adapted tobedepressed to compress said spring, a latch restraining such actionduring the playing operation, and means actuated by the motor afterreversal thereof serving to retract said latch and permit the brake tobe thrown to braking position.

3. Means of the character set forth in claim 1 characterized by a leverequipped with a brake-shoe, a push-rod connected with said lever, aspring mounted on said push-rod, and a rock-frame provided with aperforation serving as a guide for said rod, said rock-frame beingadapted to compress said spring and serving also to carry thecontact-carrying bar of the mechanism.

4. In means of the character set forth,the combination withsheet-feeding and rewinding mechanism comprising a music roll andtake-up roll, a reversible electric motor for driving the rolls, acontact-carrying mem her, and motor-actuated means for actuating saidmember, of a brake, a spring adapted to apply braking pressure to saidbrake, and means actuated by the actuating member of saidcontact-carrying bar adapted to control the actioneof said spring.

In means of the character set forth, the combination with sheet-feedingand rewinding mechanism comprising a music roll, a take-up roll, and areversible electric motor for driving the rolls, of a brake-shoeadapted. to press against the end of the take-up roll, a lever carryingsaid brake-shoe, a spring adapted to apply braking pressure to thehrakeshoe, and motor-actuated means controlling the braking applicationof the brake-shoe.

(3. in means of the character set forth, the combination with a frame,sheet-feeding and rewinding mechanism comprising a music roll, a take-uproll, and areversible electric motor for driving the rolls, of a leversupported on a pivot parallel with one end of the frame, said leverhaving an inwardly extending arm, a brake-shoe pivotally mounted on saidarm and adapted to engage the take-up roll, a spring adapted to applybraking action to said brake-shoe, and motor actuated means adapted torelease the brake after reversal of the motor atthe end of the playingoperation.

7. In mechanism of the character set forth, the combination with thetake-up roll of sheet-feeding mechanism, of a pivotally mountedbell-crank lever having a depending arm provided with an inturnedextension carrying a brake-shoe adapted to bear against, the end of thetake-up roll, a pushrod connectedwith the upper portion of saidbell-crank lever, a spring mounted on said push-rod and adapted todepress the same, and a rock-frame having mounted thereon acontact-carrying bar and equipped with a lug adapted to compress saidspring when the contact-carrying bar is thrown to the inoperativeposition. I

8. In meansof the character set forth, a reversible motor, acontact-carrying bar, a rock-frame on which said bar is mounted equippedwith an actuating arm, means driven by said motor for lifting saidactuating arm, a braking device co-acting with the take-up roll of themechanism, and retracting means for said braking device actuated by theactuating arm of said rock-frame.

OSCAR PETERSON.

